What are you going to be doing with the this computer. The 3317M is a "regular" dual core I5 mobile processor. The 2217U is also a dual core I5 but is an ultra low power low TDP similar to an Intel Atom. Personally I would take the 3317M I am not a fan of those ultra low power processors to me they are so focused on power consumption and TDP that they give up to much performance and are just to slow.
Thanks.... for the reply.... The computer would be used for Office 2010 premium as of now and Window 8 the os that comes with it
Going forwards I could use this laptop for photoshop....
Would appreciate your inputs..